Book-stitching machine.



No. 795,623. PATBNTED JULY 25, 1905.

P. KUGLER.

BOOK STITGHING MACHINE.

ArrLmA'rIoN FILED our. '1, 1902.

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1 7 H M fi u t P KUGLER. BOOK STITGHING MACHINE.

APPLICATION FILED OCT. 7, 1902- ANDIW GRAHAM co nmounmlmna vummtuzcIllll'llll llll HHH llllllrll ll llll H N0. 795,62} PATENTED JULY 25,1905.

' I. KUGLER.

BOOK STITCHING MACHINE. APPLIOATION VIILED 001 .7 1902.

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No. 795,628. PATENTED JULY 25, 1905.

- .1". KUGLER.

BOOK STITGHING MACHINE.

APPLICATION FILED 0011.7, 1902.

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I zvenf017 by I! UNITED STATES PATENT OFFICE.

FRIEDRICH KUGLER, OF FRAUENFELD, SWITZERLAND, ASSIGNOR TO THE FIRM OFAOTIENGESELLSOHAFT, VORMALS F. MARTINI & 00., OF FRAU- ENFELD,SWITZERLAND.

BOOK-STITCHING MACHINE.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed October '7 1902. Serial No. 126,368.

To all whom, it may concern:

Be it known that I, FRIEDRICH KUGLER, a subject of the Emperor ofGermany, residing at Frauenfeld, Switzerland, have invented new anduseful Improvements in Book-Stitching Machines, of which the followingis a specification.

This invention relates to book-stitching machines of the kind that areprovided with one or more pairs of reciprocating needles, each such paircomprising an eyed needle and a hooked needle and with a thread-layingdevice for each pair of needles, which moves to and fro between the eyedand the hooked needle of its pair in such a way that after the threadhas been carried through a sheet by the downward movement of the eyedneedle it is by means of the thread-laying device brought to the hookedneedle, which upon its ascent takes a thread-loop withit and draws itthrough a thread-loop which surrounds the hooked needle and which wasformed while stitching the preceding sheet. In machines of the typereferred to each hooked needle makes a half-revolution at thecommencement of each downward or upward movement, upon the downwardmovement for the purpose of avoiding the unhooking of the thread-loopheld by the hooked needle and upon the up-,

ward movement for the purpose of facilitating the drawing of thethread-loop just carried upward through that formed while stitching thepreceding sheet.

According to this invention the turning of a hooked needle through ahalf-revolution is effected as follows: Upon the periphery of theneedle-bar which carries the hooked needle is formed a spiral groovethat reaches half-way round the circumference of the bar and is engagedby a stud. Upon the bar are also formed two circumferential grooveswhich are connected by two diametrically opposite longitudinal grooveswhich form a pair of parallel inclines, each extending from the bottomof one circumferential groove to the edge of the other. A spring-catchengages alternately in the upper and the lower circumferential groove,and thus prevents the movement of the bar in the direction of itslength, except when after half a revolution the deep end of thelongitudinal groove leading out from the bottom of the circumferentialgroove lies opposite to the spring-catch.

As the bar moves to and fro its rotation is effected by the spiralgroove in conjunction with the spring-catch engaging therein.

The accompanying drawings illustrate an example of the apparatus inaccordance with this invention.

Figure 1 is a vertical section through a machine embodying my invention.Figs. 2 and 3 are elevations, partly in section, of the crossheads andneedle bars or shafts and their guides. Fig. i is an elevation of thethreadcarrying mechanism and adjacent parts. Fig. 5 is a verticalsection through the parts shown in Fig. 4; and Figs. 6, 7, 8, and 9 aredetail views, respectively, of the piercing and carrying mechanism andthe progressive formation of the stitch.

The machine therein represented has two pairs of needles, each paircomprising an eyed and a hooked needle; The number of pairs employedmay, however, be varied according to the length of the sheets 'to bestitched. In some instances one pair only will sufiice, while in otherinstances more than two pairs would be provided. The hooked needles areeach placed in a block 1, forming a needle-bar guide. The needles derivetheir movement from a cam-disk 15, Fig. 1, which actsupon an arm 18.This arm 18 is connected, by means of a rod 19, with one of a pair ofarms 14., keyed upon an axle 13. The ends of the arms 14 are connectedby a rod 16, which by means of links 17 is connected with thecross-heads 5 at the upper ends of the shafts which carry the needles.Each shaft 3, which carries a hooked needle 2, has in its upper portionextending half-way around the periphery of the shaft a spiral groove 4,which is engaged by a screw-stud 6, firmly secured in the cross-head 5.In that portion of the shaft 3 which passes through the needle-bar guide1 are formed two circum ferential grooves 7 and 8, which are situated ata certain distance apart and are mutually connected by two diametricallyopposite longitudinal grooves 9 and 10, which form inclines running fromthe bottom of one circumferential groove to the edge of the other. Inthe grooves 7 and 8 there engages a catch 12, Figs. 2 and 3, which isacted upon by the spring 11, fastened to the block 1, and slidesalternately in the grooves 9 and 10. The

thread-laying devices 20 are secured upon a shaft 22, which is mountedin the upper part of the lever 21 and which, by means of a sleeve 23,mounted on its rear end, and of the draw-bar 2 1, secured by a pivot inears on the sleeve 23, is connected with the upper end of a lever 26,Figs. 1, 5, and 6. This lever is mounted to oscillate upon the stud 25and is moved to and fro by the action of the curved disk 27 upon itslower end, whereby a longitudinal reciprocatory motion is imparted tothe shaft 22. By means of a spiral spring 29, mounted on the other endof this shaft and secured at one end to the sleeve 23, a tongue 28,fixed upon the front end of the shaft 22, is always pressed against aguide 30, situated immediately below it and provided throughout aportion of its length with a sharply-in clined surface, which, when thetongue 28 travels up it, causes the shaft 22 to make a slight rotationand, together with the threadlaying device, to turn slightly toward thefront.

The apparatus described operates as follows: The sheet to be secured bystitching is first perforated by the punching-needles 31, and throughthe holes thus produced are simultaneously passed the eyed needle 32,carrying the thread, and the hooked needles 2, with their hooks facingto the front and surrounded by the thread-loop formed when the precedingsheet was stitched. During this operation the spring-catch 12, engagedin the circumferential groove 8, will enter the longitudinal groove 10,standing opposite to it, and upon the descent of the rod 16'and of theneedlebar 3 it will engage the upper circumferential groove 7, and thussecure the needle-bar 3 in this position. The thread passed through the7 sheet by the eyed needle 32 is now seized by the thread-laying device20, which carries it forward and lays it beside the hooked needle 2, asshown in Fig. 5. At this moment the tongue 28 upon the thread-layingshaft 22 travels up the steep surface of the guide 30, and the shaft 22,

together with the thread-layin g device 20, turns slightly toward thefront and places the thread carried by it upon the hooked needle 2. Therod 16 now moves upward, and as the bar 3 is held by the catch 12,engaged in the circumferential groove 7, the stud 6, secured in thecross-head 5 and engaging the spiral groove 4, will during its upwardmovement turn the bar 3 through a half-revolution, and thus bring thecatch 12 into position in front of the deep part of the longitudinalgroove 9, cause the catch to enter the said groove, and thus allow thebar 3 to complete its upward movement, whereupon the catch 12 againengages the circumferential groove 8 and secures the bar 3 fast in itsupper position. .With the semirevolution of the bar 3 that has takenplace.

the hooked needle 2, secured therein, is also rotated and its hookcaused to take up a position under the thread that lies against it. Thisthread is now carried upward by the hook upon the continuation of itsupward movement and is drawn through the loop formed when the precedingsheet was stitched, which still surrounds the needle, Fig. 10. By theoperation of the tongue 28, which is fastened at the end of its shaft 22and which leaves the sharply-inclined surface of the guide 30 upon thereturn motion of the shaft 22, the threadlaying device 20 is meanwhilereturned to its normal lateral position behind the eyed needle 32. A newsheet is now brought under the needles and perforated by thepunchingneedles 31, and upon the next downward movement of the rod 16the bar 3, held fast in the groove 8 by the catch 12, is again by theoperation of the screw 6 and the spiral groove 4 caused to make asemirevolution, so as to turn the book of the needle 2 toward the front,the catch 12 is again brought into position before the groove 10, so asto allow the bar 3 to continue its downward movement, and the entireoperation is repeated. By means of the last semirevolution of the hookedneedle last referred to the thread-loop held by it is prevented frombecoming unhooked as the hooked needle moves downward.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. In a book-stitching machine, the combination, with asuitable support, of a needle-bar guide mounted thereon, needle-barsslidably mounted within the guide, annular grooves formed upon theneedle-bars, a catch mounted in the guide and engaging one of-theannular grooves, inclined grooves leading from the bottom of one annulargroove to the circumference of the bar adjacent of the other annulargroove and serving as a path for the catch, means for impartinglongitudinal movement to the needle-bar, and means for converting saidlongitudinal movement into a partial rotary movement of the needle-bar.

2. In a book-stitching machine, the combination, with a suitablesupport, of a needle-bar guide mounted thereon, needle-bars looselymounted within the guide, two annular grooves formed upon eachneedle-bar, a yielding catch mounted in the guide and adapted to engageone of the annular grooves, diametrically opposite inclined groovesleading from the bottom of one annular groove to the circumference ofthe bar adjacent to the other annular groove and adapted to serve as apath for the yielding catch, means for imparting longitudinal movementto the needle-bar, and means for converting said longitudinal movementinto a' partial rotary movement of the needle-bar.

3. In a book-stitching machine, the combination, withasuitable support,of aneedle-bar guide mounted thereon, a needle-bar loosely mountedwithin the guide, spaced annular grooves formed upon the needle-bar, aspringpressed catch adapted to engage the annular grooves, diametricallyopposite inclined grooves leading from the bottom of one annular grooveto the surface of the needle-bar adjacent to the other annular grooveand serving as a path for the catch from one annular groove to theother, means for imparting a longitudinal movement to the needle-bar, acircumferential spiral groove formed in the needle-bar, a lug carried bythe operating means and adapted to engage in said spiral groove, wherebyduring a portion of the longitudinal stroke of the operating means theneedle-bar will be held by the spring-pressed catch against longitudinalmovement and will be partially rotated and thereupon the inclined groovewill permit a longitudinal movement until the spring-catch engages theother annular groove.

4:. In a book-stitching machine, the combination, with asuitablesupport, of a needle-bar guide mounted thereon, a pair of needle-barsloosely mounted within the guide, an eyed needle carried by one bar, ahooked needle carried by the other bar, a thread -carrier adapted toengage the thread held by the eyed needle and transfer the same to apoint adjacent to the hooked needle, a tongue having fixed relation tothe thread-carrier, a projection mounted upon the support and having aninclined face adapted to be engaged by the tongue, whereby thethread-carrier will be moved laterally into such position as to placethe loop of thread upon the hooked needle, a spring-pressed catchmounted upon the needle-barguide, spaced annular grooves formed upon theneedle-bar provided with a hooked needle and adapted to receive thespringpressed catch, diametrically opposite inclined grooves parallel toeach other and connecting the bottom of one annular groove with thesurface of the needle-bar adjacent to the other annular groove, acircumferential spiral groove formed in the needle-bar, a cross-headconnected with the operating means, a lug carried by the cross-head andadapted to engage the spiral groove, whereby longitudinal and rotarymovement will be intermittently imparted to the needle-bar and theneedles carried thereby.

5. In a book-stitching machine, the combination, with reciprocatingeye-needles, reciprocating hook-needles, and a thread-carrier passing toand fro between them, of means for imparting to each hook-needle apartial rotation comprisinga bar carrying said hookneedle, a spiralgroove extending over part of the circumference of the bar, twocircumferential grooves connected by longitudinal grooves inclined inthe same direction onopposite sides of said bar from the bottom of theone circumferential groove to the edge of the other, a spring-actuatedcatch adapted to engage the circumferential grooves, and a lug adaptedto move up and down in engagement with the spiral groove, whereby thelongitudinal movement of the operating means is intermittently convertedinto a partial rotary movement of the needle-bar.

6. In a book-stitching machine, the combination, with a reciprocatingeye-needle, a reciprocating hook-needle, and a thread-carrier passing toand fro between them, of means for imparting to the hook-needle apartial rotation comprising a bar carrying the hook-needle, a spiralgroove extending over half the circumference of the bar, twofurrow-shaped circumferential grooves encircling said bar, twodiametrically-opposed longitudinal grooves inclined in the samedirection on opposite sides of said bar from the bottom of onecircumferential groove to the edge of the other, a reciprocating lugengaging with the spiral groove, a spring-actuated catch engaging withthe circumferential grooves and the longitudinal grooves, whereby thelongitudinal movement of the operating means is intermittently convertedinto a partial rotary movement of the hook-needle bar, a bar having thethread-carrier mounted thereon, a tongue mounted on said bar, a guideprovided with an inclined surface, and a spring serving to press thetongue against the inclined surface, whereby the forward movement of thethread-carrier is converted into amomentary horizontal latguide mountedthereon, needle-bars slidably mounted within the guide, annular groovesformed upon the needle-bars, a catch mounted in the guide and engagingone of the annular grooves, inclined grooves leading from the bottom ofone annular groove to the circumference of the bar adjacent of the otherannular groove and serving as a path for the catch, means for impartinglongitudinal movement to the needle-bar, and means for converting saidlongitudinal movement into a partial rotary movement of the needle-bar,of means for carrying the thread from one needle to the other, and meansfor imparting to the carrier a lateral movement with respect to thegeneral direction of its path.

8. In a book-stitching machine, the combination, with a suitablesupport, a needle-bar guide mounted thereon, needle-bars loosely mountedWithin the guide, eye and hook needles carried by the bars, two annulargrooves formed upon each needle-bar, a yielding catch mounted in theguide and arranged to engage one of the annular grooves,oppositely-dis-- posed inclined grooves leading from the bottom of oneannular groove to the circumference of the bar adjacent to the otherannular groove and serving as a path for the yielding catch, means forimparting longitudinal movement to the needle-bar, and means forconverting said longitudinal movement into apartial rotary movement ofthe needle-bar, of a threadcarrier mounted for movement from theeyeneedle to a point adjacent to the hook-needle, an inclined surfacearranged to impinge against the thread-carrier and deflect the same froma straight path sufliciently to place the thread carried thereby uponthe hook-needle, and means for imparting motion to the threadcarrier inunison with the movement of the needle-bars.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

FRIEDRICH KUGLER.

Witnesses:

A. M. LIEBERKNEOHT, E. BLUM.

